Edited highlights from a late '60s bondage S&M film-loop. These 8-12 minute silent shorts were available in 8mm or 16mm and sold mostly by mail order from ads placed in girlie magazines.
This one is a bit unusual as it's set in a basement dungeon at a time when most of these were shot in living rooms or bedrooms. Here a mistress binds and gags her female slave. Interesting use of a metal bed-frame and a ball and chain as neck weight. Ends with somewhat humorous fake spanking with a canoe paddle. These films were supposed to look hardcore, kinky, and menacing, but this one has all the realism of a 1920s silent comedy.
Search for "fetish film" to see more in this series.
This public domain film and music (not added by me) is part of the Bizarro Sex Loops series of compilation videos.